放牧强度对榆树疏林草原草本层生物量及季节动态的影响  

Effects of Grazing Intensity on the Biomass and Seasonal Dynamics of the Herb Layer in the Elm Sparse Forest Steppe

作　　者：王亚娟 张淑艳[1] 于静辉 商博 孙振权 杨若琪 周佳铭 谭国娟 张艺桐 WANG Ya-juan;ZHANG Shu-yan;YU Jing-hui;SHANG Bo;SUN Zhen-quan;YANG Ruo-qi;ZHOU Jia-ming;TAN Guo-juan;ZHANG Yi-tong(College of Agriculture,Inner Mongolia Minzu University,Tongliao 028043,China;Tongliao Agricultural Technology Extension Center,Tongliao 028000,China;Hailar District Agricultural and Animal Husbandry Technology Promotion Center,Hulunbuir City,Inner Mongolia,Hulunbuir,021008,China)

机构地区：[1]内蒙古民族大学农学院,内蒙古通辽028043 [2]通辽市农业技术推广中心,内蒙古通辽028000 [3]内蒙古呼伦贝尔市海拉尔区农牧业技术推广中心,内蒙古呼伦贝尔021008

出　　处：《内蒙古民族大学学报（自然科学版）》2022年第3期236-240,共5页Journal of Inner Mongolia Minzu University：Natural Sciences

基　　金：内蒙古自治区自然科学基金项目(2019MS(LH)03016);通辽市与内蒙古民族大学科技合作项目(SXYB2012060)。

摘　　要：以通辽市科尔沁榆树疏林草原为研究对象,以牧户牧场为单位,根据放牧情况划分轻(1.07羊单位·hm^(-2)·a^(-1))、中(2.25羊单位·hm^(-2)·a^(-1))、重(3.38羊单位·hm^(-2)·a^(-1))3个放牧强度,从6月11日—10月11日逐月测定草本层生物量,研究放牧对草本层生物量及季节动态的影响。结果表明:榆树疏林草原草本层生物量在7—9月是生长高峰期;重度放牧下草本层总生物量显著高于中度和轻度放牧;而多年生禾草生物量显著低于轻度和中度放牧;优良牧草生物量随放牧强度的增加而减少,猪毛蒿等一、二年生植物生物量随放牧强度的增加而增加。Taking elm sparse forest steppe in Horchin of Tongliao City as the research object and the herdsman’s pasture as the unit,the grazing intensity intensities were divided into three groups including light(1.07 sheep unit·hm^(-2)·a^(-1)),medium(2.25 sheep unit·hm^(-2)·a^(-1))and heavy(3.38 sheep unit·hm^(-2)·a^(-1))according to the grazing situation.The herbaceous layer biomass was measured monthly from June 11 to October 11 to study the effects of grazing on herbaceous layer biomass and seasonal dynamics.The results showed that the herbaceous layer biomass of elm sparse forest steppe was the growth peak from July to September;The total biomass of herbaceous layer under heavy grazing was significantly higher than that under moderate and light grazing;The biomass of perennial grass was significantly lower than that of light and moderate grazing;The biomass of fine herbage decreased with the increase of grazing intensity,while the biomass of annual or biennial plants such as Artemisia scoparia increased with the increase of grazing intensity.

关 键 词：榆树疏林草原 生物量 放牧强度 科尔沁沙地 

分 类 号：S812[农业科学—草业科学]